events.list with only an API key works on a calendar shared publicly as free/busy: HTTP 200 with accessRole freeBusyReader, items and a nextSyncToken.

Google Calendar API · GET /calendar/v3/calendars/{calendar_id}/events · HTTP 200

Status: ✅ verified:server:prod · first seen 2026-10-24 · last confirmed 2026-10-27 · 34 confirmations from 2 vantages

What to do

1. No client-side fix known (by design).

Dimensions

env: prod · plan: any · region: any · account_state: api_key

Evidence

Probe af:google-calendar:probe:events-free-busy-reader (declarative, source)

Observations: none from reporters yet.

Machine access

curl -s https://apifacts.dev/v0/check \
  -H 'content-type: application/json' \
  -d '{"target":{"method":"GET","url":"https://www.googleapis.com/calendar/v3/calendars/{calendar_id}/events"},"error":{"status":200}}'

YAML: facts/google-calendar/public-free-busy-calendar-via-api-key.yaml

Data: CC BY 4.0 · apifacts registry · This page is generated; edit the YAML, not the page.